In January, with funding from Lux Capital and other venture capital firms, two former members of Apple’s Special Projects Group, Soroush Salehian and Mina Rezk, started Aeva.
The company aims to improve the ability of self-driving cars to see their surroundings, according to New York Times report. Salehian and Rezk are reimagining Lidar—that is, Light Detection and Ranging—technology, which today’s self-driving cars use along with cameras, radar, GPS antennas, and other implements to create a picture of the world around them.
Aeva’s lidar, the company says, measures distances more accurately than other such systems. And, unlike other lidar systems, Aeva’s judges velocity. It is also smaller and less expensive than today’s lidar technology.
Aeva aims to have it on the market by 2018.
Traditional lidar devices emit pulses of light and measure their wavelength and return times to determine how far away a given object is. Then, computers use the data to construct three-dimensional models of the surrounding world.
But, today’s lidar systems can only detect objects that are relatively close, and cannot always differentiate between one object and another, the Times notes. As a result, they do not perform well in bad weather or when moving at high speeds.
Radar, which uses electromagnetic waves rather than light waves to map the world, can detect objects at greater distances, making it more suitable when traveling at high speeds, and cameras can “read” street signs and differentiate between, say, a pedestrian and a crosswalk.
So, cameras, radar, lidar and other devices work together to “drive” today’s autonomous vehicles. Driverless cars will likely continue to employ this combination for the foreseeable future, as multiple detection systems represent multiple layers of security.
Lidar devices, along with the rest of the ensemble, are expensive. It costs hundreds of thousands of dollars to outfit a self-driving car with the necessary hardware. The prohibitive cost of production prevents companies from marketing self-driving cars to average consumers. So, the first self-driving cars are not privately owned; rather, they have debuted in the fleets of companies like Lyft and Uber.
But, the Times cites a report by the Boston Consulting Group that projects that the self-driving car market will be worth $42 billion by 2025. For that to happen, companies must find ways to produce the vehicles more affordably.
The Times equates Aeva’s system to a cross between lidar—which is ideal for judging distances—and radar, which is best at detecting speed. Rather than emitting a series of light pulses, the device sends out a constant wave of light. This approach, Rzek told the Times, allows Aeva lidar to produce a better resolution, work better in inclement weather, and handle reflective surfaces better than standard systems do.
“I don’t even think of this as a new kind of lidar,” Tarin Ziyaee, co-founder and chief technology officer at the self-driving taxi start-up Voyage, who has seen the Aeva prototype, told the Times. “It’s a whole different animal.”
Researchers at the University of California, Berkeley, developed a similar continuous-wave lidar system back in 2014, the Times notes. Other companies that develop lira technology, such as Velodyne and Oryx Vision, are exploring similar options, according to said publication.
Lidar’s applications go well beyond driverless cars. Law enforcement uses the technology to create automated speed traps. Lidar may one day track a user’s movements for virtual-reality environments.
Today, video game systems like the Xbox Kinect do not use Lidar, because Lidar devices are too expensive, too bulky, and too power-consumptive for the purpose. But, continuous-wave Lidar systems are cheaper and lighter than pulse-based ones.
Behnam Behroozpour of U.C. Berkeley told phys.org in 2014 that he envisions that Lidar can be used for “a host of new applications that have not even been invented yet.” For instance, cell phones could use the technology to recognize a user and detect his hand motions from across the room, allowing him to control the device with simple hand gestures.
BMW’s first level-5 self-driving offering, which the company plans to release by 2021, will allow human riders to use hand gestures to order Amazon packages, make a dinner reservation, and perform a range of other actions.
Featured image via Wikimedia Commons